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REFERENCES A ndraka D., D zienis L. 2013. Modelowanie ryzyka w eksploatacji oczyszczalni ścieków [Modeling of risk in the operation of wastewater treatment plants]. Rocznik Ochrona Środowiska. Vol. 15 p. 1111–1125. B ergel T. 2005. Objętość ścieków odprowadzanych z gospodarstw wiejskich do kanalizacji w zależności od struktury zużycia wody wodociągowej [The volume of sewage discharged from rural households to sewerage depending on the structure of water consumption]. PhD Thesis. AR w Krakowie. Wydział Inżynierii Środowiska i Geodezji pp. 175. B ergel T., K

REFERENCES A ndraka D., D zienis L. 2003. Wymagany poziom niezawodności oczyszczalni ścieków w świetle przepisów polskich i europejskich [Required reliability level of wastewater treatment plants according to European and Polish regulations]. Zeszyty Naukowe Politechniki Białostockiej. Ser. Inżynieria Środowiska. Nr 16 p. 24–28. A ndraka D., D zienis L. 2013. Modelowanie ryzyka w eksploatacji oczyszczalni ścieków [Modeling of risk in the operation of wastewater treatment plants]. Rocznik Ochrona Środowiska. Nr 15 p. 1111–1125. B łażejewski R. 2005. Aktualny

Abstract

The paper presents results of research concerning operating of five small wastewater treatment plants working in two different technologies: hydrobotanical wastewater treatment plant and constructed wetland. Each object was designed for the treatment of domestic sewage after preliminary mechanical treatment in a septic tank. Hydrobotanical wastewater treatment plants and one of constructed wetland beds were built for treating sewage produced in educational institutions and resort. In the article attention is paid to possibility of exceeding the maximum allowable concentration of pollutants for three main indicators of pollution: BOD5, COD, and total suspension. The reduction of these indices is required by the Regulation of the Minister of Environment [14] for wastewater treatment plants with PE < 2000. In addition, the paper presents the effects of wastewater treatment to reduce biogens. The best quality of outflow was reached by outflows from constructed wetland treatment plants. None of the observed objects fulfilled the requirements in terms of allowable concentrations for total suspension. The most effective were objects operating in technology of “constructed wetland”.

chromatography, Water Environment Research , 67118-1256. 6. Czerwionka K., Makinia J., Pagilla K. R. and Stensel H. D., 2012 ‒ Characteristics and fate of organic nitrogen in municipal biological nutrient removal wastewater treatment plants, Water Research , 462057-462066. 7. Dignac M. F., Ginestet P., Ryback D., Bruchet A., Urbain V. and Scribe P., 2000 ‒ Fate of wastewater organic pollution during activated sludge treatment: nature of residual organic matter, Water Research , 344185-344194. 8. Grohmann K., Gilbert E. and Eberle S. H., 1998 ‒ Identification of nitrogen

Microbiol and Biotechnol. 1997;13(5):511-517. DOI: 10.1023/A:1018505107030. [4] Martín-Cereceda M, Pérez-Uz B, Serrano S, Guinea A. Dynamics of protozoan and metazoan communities in a full scale wastewater treatment plant by rotating biological contactors. Microbiol Res. 2001;156(3):225-238. DOI: 10.1078/0944-5013-00105. [5] Madoni P. Estimates of ciliated protozoa biomass in activated sludge and biofilm. Bioresour Technol. 1994;48(3):245-249. DOI: 10.1016/0960-8524(94)90153-8. [6] Łagód G, Chomczyńska M, Montusiewicz A, Malicki J, Bieganowski A. Proposal of measurement

Development and First Year Operation of Extended Wastewater Treatment Plant in Dobron

The aim of the investigation was characterizing and operation assessment of the wastewater treatment plant in Dobron taking into consideration its flow capacity, before (350 m3/d) and after development including building of the second technological pipe with the same flow capacity (350 m3/d), finished in September, 2009. Concise description of the applied wastewater treatment technology and results of investigations concerning flow rates of wastewater within last few years, are presented. Example results of wastewater composition analysis and reached treatment conversion are described. Analysis results of screenings, sand removed from sand traps and stabilized sludge are shown.

References [1] Gücker, B, Brauns M, Pusch MT. Effects of wastewater treatment plant discharge on ecosystem structure and function of lowland streams. J N Am Benthol Soc. 2006;25:313-329. DOI: 10.1899/0887-3593(2006)25[313:EOWTPD]2.0.CO;2. [2] Smith VH, Tilman GD, Nekola JC. Eutrophication: Impacts of excess nutrient inputs on freshwater, marine, and terrestrial ecosystems. Environ Pollut. 1999;100(1-3):179-196. DOI: 10.1016/S0269-7491(99)00091-3. [3] Strom PF, Matulewich VA, Finstein MS. Concentrations of nitrifying bacteria in sewages, effluents and a receiving

–78. [7] Weissenbacher N., Mayr E., Niederberger T., Aschauer C., Lebersorger S., Steinbacher G., Haberl R., Alpine infrastructure in Central Europe: integral evaluation of wastewater treatment systems at mountain refuges , Water Science & Technology – WST, 57.12/2008, 2017–2022. [8] Maunoir S., Philip H., Rambaud A., Small wastewater treatment plants in mountain areas: combination of septic tank and biological filter , Water Science & Technology, 56(10)/2007, 65–71. [9] Mucha Z., Wójcik W, Investment costs of small wastewater treatment plants with SBR reactors in

–78. [7] Weissenbacher N., Mayr E., Niederberger T., Aschauer C., Lebersorger S., Steinbacher G., Haberl R., Alpine infrastructure in Central Europe: integral evaluation of wastewater treatment systems at mountain refuges , Water Science & Technology – WST, 57.12/2008, 2017–2022. [8] Maunoir S., Philip H., Rambaud A., Small wastewater treatment plants in mountain areas: combination of septic tank and biological filter , Water Science & Technology, 56(10)/2007, 65–71. [9] Mucha Z., Wójcik W, Investment costs of small wastewater treatment plants with SBR reactors in

bioindicators in sewage treatment. A. Polytech. Hung., 5(3), 117–124. Nicolau, A., Dias, N., Mota, M. & Lima, N. (2001) Trends in the use of protozoa in the assessment of wastewater treatment. Res. Microbiol., 152, 621–630. Podgórniakowa, M. (2001) Operat wodno-prawny na eksploatację Centralnej Oczyszczalni Ścieków dla m. Poznania w Koziegłowach (The water-law operate for the operation of the Central Wastewater Treatment Plant for the city of Poznań in Koziegłowy). Poznań: COŚ (In Polish). Ratsak, C.H., Kooijman, S.A.L.M. & Kooi, B.W. (1993) Modelling the growth of an